My dwarf gourami has developed a large white spot under his eye. This spot (only one) is as big as his eye. It is not small white spots that you normally would see with ich. I was wondering if anyone could please help and identify?

6. What fish do you have? How many are in your tank? How big are they? How long have you had them?8 Mollies 4 Julii Cories 3 Guppies 1 Dwarf GouramiAll fish are about 2 inches and have been in tank for 6 months minimum

7. Were the fish placed under quarantine period (minus the first batch from the point wherein the tank is ready to accommodate the inhabitants)?No new fish added for 6 months